All of my pasture fence is barbed wire. I don't pound the staple all the way in, I leave it just barely snug, so I can pull wire through it if I need to.  After the post gets as hard heck, you can use wire to tie the barbed wire to the post.  I kill all my wire when I put it on, so there's no stretch left anyway if it happens to break. You have to do it right the first time, cause it's darn near impossible to pull slack out of the wire after its clipped to T posts anyway. Here are some pictures of some hedge posts that I used to build a catch pen in one of my pastures. These things will still be standing long after I'm gone.  The bottom picture is of a typical fence, one hedge post and then 3 or 4 T posts, and so on.